Photographic enlarger



7 July 21, 1959 w. J. BUDDE PHOTOGRAPHIC ENLARGER Filed Feb. 20, 1957 2Sheets-Sheet 1 William :IBzzdde INVENTOR ATTORNEYS 9 5 9 1 1n 2 I u J W.J. BUDDE PHOTOGRAPHIC ENLARGER an aw e z B J m w INVENTOR ATTORNEYSPHOTOGRAPHIC ENLARGER William J. Budde, New Orleans, La. ApplicationFebruary 20, 1957, Serial No. 641,387

1 Claim. (CI. 88-24) This invention relates to a new type of high speedautomatic vibration-proof photographic enlarger. Present dayphotographic enlargers operating at their maximum speed can expose about300 pictures per hour. This high speed enlarging machine is capable ofexposing more than a thousand pictures per minute. Present dayphotographic enlargers must be operated in a room that is dark and freeof all vibration. This enlarging machine can be installed in a lighttight cabinet and operated anywhere that man can go regardless of lightor vibrations such as buses, trailers, trucks, trains, ships,submarines, airplanes, space ships, etc.

Large rolls of light tight photographic printing paper are fed into themachine much the same as in a roll film camera. For the artisticphotographer who must spend many hours exposing one picture, thismachine can be operated like any conventional enlarger by using thepilot light manually to expose the picture.

An object of this invention is to provide a high speed enlarger wherebyprints may be made from a negative by use of a machine in whichvibration is entirely eliminated.

Another object of this invention is to provide a photographic enlargerwhich will print at relatively high speeds with color and sharpoutlines.

A further object of this invention is to provide a vibration-freephotographic printing machine embodying the use of a pilot light wherebythe negative may be focused on the printing paper and subsequently aflash may be produced whereby the light will be projected throughnegative and onto the printing papers.

A further object of this invention is to provide a n1achine of this typewhich is of simple construction so that the machine will not readily getout of order.

With the foregoing and other objects in view which will appear as thedescription proceeds, the invention consists of certain novel details ofconstruction and combinations of parts, hereinafter more fully describedand pointed out in the claim, it being understood that changes may bemade in the construction and arrangement of parts without departing fromthe spirit of the invention as claimed.

Referring to the drawings:

Figure 1 is a detail front elevation partly in vertical section of aphotographic printing machine constructed according to an embodiment ofthis invention.

Fig. 2 is a vertical section taken longitudinally through the base ofthe machine.

Fig. 3 is a diagrammatic view showing the electric circuits embodied inthis invention.

Referring to the drawings the numeral 10 designates generally a basestructure which is formed of a horizontal platform or table 11 havingdepending legs or walls 12 and 13 extending downwardly from each endthereof. The base 10 also includes printing paper housing members 14 and15 disposed at each end of the base 10. A motor 16 is disposed below thetable or platform 11 on the nited States Patent M 2,895,378 PatentedJuly 21, 1959 inner side of the wall 13 and a pair of outwardlyprojecting roll supporting arms or brackets 17 extend outwardly from thewall 13 and the arms 17 are each provided with an outwardly and upwardlyinclined notch 18 within which the shaft 19 is adapted to rotatablyengage. A grooved pulley 20 is mounted on one end of the shaft 19 and abelt 21 engages about the pulley 20 and also about a driving pulley 22which is mounted on the motor shaft 23. The shaft 19 has a roll 24secured thereto and about which the printing paper 25 is adapted to bewound. The housing 15 includes a hinged cap 26 which is hinged as at 27so that the cap 26 may be raised upwardly and outwardly to permitremoval of the wound paper on the roll 24. The cap 26 includes aninwardly projecting flange 28 which is formed on the inner wall 29 ofthe cap and the flange 28 is rounded as at 30 so as to present a smoothnon-scratching surface to the upper sensitive side of the paper 25.

A lower idler roller 31 is mounted on a shaft 32 journaled in the lowerportion of the housing 15 and an upper roller 33 is carried by the shaft34 journaled in bearings 35 carried by the lower portion of the housing15. At the opposite or left end of the base 10 the housing 14 has a pairof upwardly projecting bracket arms 36 having upwardly and outwardlyinclined notches 37 in which a shaft shown at 38 is adapted to rotatablyengage. The shaft 38 lras fixed thereon an inner roll 39 about which apaper roll 25 constituting the printing sup ply paper is adapted to bewound. The paper 25 is extended forwardly or to the right between a airof idler rollers 41 and 42 similar to rollers 31 and 33 and the paperthen engages beneath a lower flange 43 carried by the inner wall 44 of ahinge cap 45. The cap 45 is hinged as at 46 to the housing 14. Roller 41is carried by a shaft 77 journaled in arms 36, and the roller 42 iscarried by a shaft 78 journaled in bearings 79.

The base 10 has mounted therein adjacent the motor 16 a flash tube colorsupply member generally indicated at 47. A vertically disposed standardor supporting base 48 rises from one side of the base 10 and has mountedthereon a combined negative holder and light source generally indicatedat 49. A tubular housing 50 is provided which is secured to the base 48and is vertically adjustable in a conventional manner (not shown). Thehousing 50 has extending downwardly therefrom a bellows 51 and thebellows 51 at the lower end thereof, has secured thereto a lens 52. Anegative holder 53 is disposed at the upper end of the bellows 51 and isadapted to hold a negative which is projected through the lens 52 ontothe sensitive upper side of the printing paper 25 which is positioned onthe upper side of the table 11. The housing 50 has mounted therein apair of oppositely disposed globular light-diffusing members 54 and 55.A partly globular reflector 56 extends upwardly from the housing 50 anda pair of light bulbs are disposed in a socket 57 carried by the upperportion of the reflector 56. The light bulbs which are disposed in thesocket 57 comprise a pilot light 58 and a flasher tube 59. The twolights 58 and 59 may be formed as an integral or double unit so that thetwo lights may be mounted in a single socket. The light 58 which is thepilot light is connected by means of conductors 60 and 61 to a pair ofconductors 62 and 63, respectively, and a manually operated switch 64 isinterposed in conductor 60.

The motor 16 is connected by means of conductors 65 and 66 to conductors60 and 61 respectively, and a manually operable switch 67 is interposedin conductor 65. The conductors 62 and 63 are connected to the powerunit 47 which provides the high voltage force required with flashing thelight bulb 59. A flasher switch generally indicated at 68, is operatedby rotation of shaft 34. A cam wheel 69 is mounted on one end of shaft34 and the cam wheel 69 includes a cam lobe 70 which is adapted toengage a normally open switch blade 71. The blade 71 is adapted toengage a contact 72 and contact 72 is connected by means of a conductor73 to one side of the power source 47. The switch blade 71 is connectedby means of a conductor 74 to one side of the light bulb 59 and theother side of light bulb 59 is connected by means of a conductor 75 tothe power source 57.

in the use and operation of this machine the negative which is to beprinted is placed in the holder 53 and the projection of the negativethrough the lens 52 is focused by closing switch 64 to energize pilotlight 58. When the negative has been properly focused switch 64 isopened to turn off pilot light 58 then switch 67 to the motor 16 isclosed so that the printing paper Will be moved from left to rightacross the table or platform 11. As the paper 25 moves over the table 11each frame or complete picture will be flashed by engagement of cam lobe70 with normally open switch 68. When this switch is closed flasher bulb59 is energized for a fraction of a second so as to thereby expose theimage of the negative upon the sensitized side of the printing paper 25.The paper 25 will be wound on roll 24 so long as motor 16 is operatingand the flasher bulb 59 will intermittently flash light through thediffusing members 54 and 55 so as to expose the image on the sensitizedside of the printing paper 25.

What is claimed is:

A photographic enlarger comprising a base, oppositely extending rollsupporting bracket arms carried by said base, a supply roll rotatablydisposed on one pair of arms, a winding roll rotatably carried by theother pair of arms, an electric motor, a belt and pulley connectionbetween said motor and said winding roll for rotating the latter, acentrally disposed platform on said base, sensitized paper in saidsupply roll extending across said platform to said winding roll, ahousing for each roll having a slotted opening therein adjacent the topof said platform, said sensitized paper extending through said opening,a pair of upper and lower idler rollers in each housing adjacent itsslotted opening, said upper roller of each pair of rollers beingdisposed above the upper side of said sensitized paper in contact withand rotating said upper rollers by contact with the sensitized paper, ashaft mounting each idler roller, a vertically disposed standardcentrally disposed on said base, a housing carried by said standard, anegative holder in said housing above said platform, an electronicflasher tube in said housing above said negative holder, a power sourceproviding current for said flasher tube, a normally open flasher switchincluding a switch blade in said housing for said winding roll, and acam on said upper roller of one pair of rollers operable intermittentlymoving said switch blade to close said flasher switch, said cam beingmounted on the shaft of the adjacent idler roller whereby rotation isimparted thereto upon rotation of its associated idler roller by thepassage of said sensitized paper thereunder.

References Cited in the file of this patent UNITED STATES PATENTS2,227,987 Tuttle Jan. 7, 1941 2,251,998 Goodale Aug. 12, 1941 2,530,396McGuffin Nov. 21, 1950 2,557,182 Forgett June 19, 1951 2,803,991 WagnerAug. 27, 1957

